Attributes

Strengths

Down Aerial very high damage, dealing around 30%, assuming all hits connect.

Egg Lay is great for setting up traps and reads.

Throws Egg at foe and turns them into a Egg for 5-10 seconds

Egg Throw is a powerful spacing and edge-guarding tool.

Egg Roll has surprisingly high priority.

Yoshi Bomb inflicts a good deal of shield damage.

Weaknesses

Poor vertical recovery, lacking a proper recovering Special Move.

Predictable recovery, relying heavily on his midair jump.

All Smash Attacks have considerable ending lag.

Very punishable grab if it misses, as it has long starting and ending lag.

Very weak throws, none of them capable of KO'ing or comboing reliably.

Has second longest dodge-roll in the game, after Samus.

Summary

Changes from SSBWU/3DS

Attributes

Excluding initial dash, dash animation has been altered.

Yarn and Crafted Yoshi from Yoshi's Wooly World and Yoshi's Crafted World, respectfully, are palette swaps.

Ground Attacks

Forward tilt has an altered animation.

Aerial Attacks

Yoshi has a new up aerial animation.

Grabs and Throws

Yoshi's mouth now appears swollen when holding an opponent, forcing him to hold it closed with his hands.

Special Attacks

Yoshi's Egg Roll side special now bounces along the ground rather than rolling.

The eggs thrown by Yoshi via Egg Throw now bounce once if they hit the ground before exploding.

Yoshi's Final Smash has been changed completely; instead of Super Dragon, Yoshi teleports the fighter to an open desert, where a Yoshi stampede tramples over them, damaging them and knocking them back, referencing a part of Melee's intro.

Moveset

Ground Attacks

Normal

Neutral Attack: Yoshi kicks once, and then kicks a second.

Forward Tilt: Yoshi swipes forwards with his tail.

Up Tilt: Yoshi swipes overhead with his tail.

Down Tilt: Yoshi swipes his tail across the ground.

Dash Attack: Yoshi kicks forwards with one foot.

Smash Attacks

Forward Smash: Yoshi performs a headbutt forwards.

Up Smash: Yoshi does a back flip, kicking overhead.

Down Smash: Yoshi swipes low to the ground with his tail on one side, then to the other side.